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參數資料
| 型號： | TPS54331DG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 2 A SWITCHING REGULATOR, 684 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件頁數： | 22/27頁 |
| 文件大小： | 794K |
| 代理商： | TPS54331DG4 |
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1
2
3
4
5
6
7
8
BOOT
VIN
EN
SS
PH
GND
COMP
VSENSE
SLVS839C – JULY 2008 – REVISED MARCH 2010
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
TJ = –40°C to 150°C, VIN = 3.5V to 28V (unless otherwise noted)
DESCRIPTION
TEST CONDITIONS
MIN
TYP
MAX
UNIT
THERMAL SHUTDOWN
Thermal Shutdown
165
°C
SLOW START (SS PIN)
Charge current
V(SS) = 0.4 V
2
mA
SS to VSENSE matching
V(SS) = 0.4 V
10
mV
DEVICE INFORMATION
PIN ASSIGNMENTS
TERMINAL FUNCTIONS
TERMINAL
DESCRIPTION
NAME
NO.
BOOT
1
A 0.1 mF bootstrap capacitor is required between BOOT and PH. If the voltage on this capacitor falls below the
minimum requirement, the high-side MOSFET is forced to switch off until the capacitor is refreshed.
VIN
2
Input supply voltage, 3.5 V to 28 V.
EN
3
Enable pin. Pull below 1.25V to disable. Float to enable. Programming the input undervoltage lockout with two
resistors is recommended.
SS
4
Slow start pin. An external capacitor connected to this pin sets the output rise time.
VSENSE
5
Inverting node of the gm error amplifier.
COMP
6
Error amplifier output, and input to the PWM comparator. Connect frequency compensation components to this pin.
GND
7
Ground.
PH
8
The source of the internal high-side power MOSFET.
4
Copyright 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS54331
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